Further clarification re: por/sobre

Question

I understand your comments below where "sobre la montaña" refers to the top of the mountain, and why "por" is the best choice. However, I'm curious about using "sobre dónde" with respect to "la cine," for example, where there is no "top". I've seen "sobre dónde" elsewhere used to mean "whereabouts", and am wondering if this is correct.

Answer

Hola Pat
I'm not sure what you mean with "sobre dónde" - we wouldn't use it that way to mean "whereabouts". If you want to ask something like "Whereabouts do you live?" we'd say:
¿Por dónde vives? 
We don't use the preposition "sobre" in that case.
Is this what you're referring to?
Saludos